Buffing appratus



Feb. 28, 1933. K SINGER 1,899,427

BUFFING APPARATUS Filed June 8, 1928 7 .J rzL/ehfm? 32 Z3 24 20' Jana/a E5277 E2? DONALD x.

" s mm mimsij s ,iAppllcation filed; June a, 192 8.-Seria1 No; 283,960.

This invention relates ito bufling apparatus and especially "to apparatus such asis used in the'rubber industry for, bufling'the skived ends of straight 7 tubes of vulcanized rubber preparatory to the splicing ofsaid "ends 111 tires. i

In the manufacture of inner tubes by the aforementioned metl1od,;one end ofthe tube accomplished while the' tube-end iscuffedor ferred form.

" turned back upon itself, which operation heretofore has resulted numerous defect ve ,j

tubes'due to'the. fact that. frequently 'the buffing wheel was allowed/to operate past the l skived end of the tube with theresultjthatit 'bufi ed the underlying tube. structure L and caused a'thin spot therein- The general object of p avoid the productionof defective inner tubes due to weakspots caused by faultygbufiing. More specificallyins object is to provide. improved apparatusforthe bufiing of-the inner surface of the end of a rubber tube.

Of the accompanyingdrawin'gz, I

Fig.1 is a side elevation fbutfing apparatus' embodying I Fig.2 isf'a section on-l-ine oi Fig.1; Fig. 3 is afrag nentary plan view of-parts of the apparatus shown Fig.1; and the work op eratively associated therev'vith apart being in section and broken away.)

Referringto the, drawing, 10 's a table or base plate upon which is mounted a journal" bracket ll for a horizontal shaft 12, the latter being connected at one end with suitable drivingmeans such as the motor 13; and having its I other end provided w th an abrasive buffer s herein shown as a wire s'cratch brush 1 1. W Pivotally mounted at 15 uponga bracket. 16

rising from the base-platefllO is an upwardly 1 extending arm17 having its freeend formed ith alaterally extending arcu'ateplate; 1 8 g the manufacture of inner tubes for pneumatic! lug 2 1 15; -2

this nvention is to my '1 invention in. its pre- SI ER O B D;Q NN TIdIIaJAs iGNQR Toxins;ninonmn; COMPANY,; 01* nnw ,YoRx,j :1\r. y.;yoonronrtrron OE-NEWKYORK'iIT' i;

constituting a shield or spacermember'which is disposed tangentially with relation tothe periphery of the brush 14:. A tension spring for normally urgingethe arm17 rearwardly away from the brush 14; and such rearward movement is limited by a stud 20 extending; fromthe bracket 16 and abuttedby aradial formed on the arm adjacent its pivot- 5 In the operation of the app ratus a back as ,sho'wnjin Fig. 3, upon a short form tube", such as thejtube 22,". which is to have the I inner face of its end portionsbufied, is mount-g I ed, with said end, portion cufied or" turned or mandrel 23 whichisrotatably mounted upon a spindle 24gprovided with a handle 25; y i Theoperator thencmounts the cuffed portion" ofthe tube upon the shield 18 in such a man-f ner that the shield is disposed between the, body portion of the tube and overlying cuif; and the two portions of the tube are held in 1 spaced-apart relation at least in the regionof 70 tion.. He thenmoves theassembly. into Il-r I gagement with the brush'llr'and by rotating;

the brushsoperation upon the cufledporthe. form 23 upon itsspindle 24 progressively presents the entire marginal portion of the Lube to thslofatiflg brush 14 to eflect the buihng thereof. P v 1 tofor'e produced byexperienced workmen. f

As will be seen-with reference to Fig.v 3, theshield .18 at all times ispositioned' be-, "tween the brush 14 andthe underlying wall I "of thetube and spacesthe two apart so that abrasion or" the latter is avoided, because of the spacing' 'and also because otthe'fpresen'ce of the member18 as a. shield, although the f brush'exte'nds beyondthe marginalportion I V of the tube. Also; the invention enables-iI'i-jv experiencedoperators to produce work of a" quantity and qualitycomparable to that here; I i

.My invention is susceptible of, modification within the scope of the appendedclairns.

I claim: r 1. A paratus for buffing a flexible portion of a ru bber article situated adjacent an exposed underlying portion thereof, compris- 5 ing a rotary buffer and a short arcuate mem ber positioned to support the portion to be buffed and to shield the adjacent underlying portion of the article, said member being mounted for movement toward and away 1 from said buffer radially of the latter.

2. Apparatus as defined in claim 1 comprising yielding means urging the supporting and? shielding member away from the hufien. y f V 15 Witness whereofI have hereunto set my hand this 31st day of May, 1928. v i DONALD K. SINGER 

